Temperature and humidity thermometer with sensor | 2.5-inch LCD display | IP65 | ZigBee Sonoff SNZB-02WD

Technical Specifications
Communication protocol: ZigBee 3.0
Compatibility: SONOFF Zigbee Bridge, eWeLink, Home Assistant, Zigbee2MQTT, etc.
Protection class: IP65 – dust and moisture resistant
Power supply: CR2477 battery (3 V, included)
Battery life: up to 1.5 years (depending on usage)
Operating temperature: –20 °C ... +60 °C
Operating humidity: 0% – 100% RH (non-condensing)
Temperature accuracy: ±0.2 °C
Humidity accuracy: ±2% RH
Housing: PC + ABS, white
Dimensions: 62.8 × 58.5 × 21.8 mm
Display: 2.5" LCD
Transmission distance: up to 100 m (open area)
Installation: wall-mounted or surface-mounted

Main Features
Real-time monitoring – temperature and humidity data are synchronized with the eWeLink app.
Automatic updates – sensor transmits data when values change.
Smart automation – create actions such as:
• If temperature < 18 °C → turn on heater
• If humidity > 70% → activate fan or dehumidifier
Mobile alerts – receive notifications when thresholds are exceeded.
ZigBee bridge support – control ZigBee and Wi-Fi devices together.
Low battery warning – alerts when battery is low.
Camera integration – view environment via eWeLink camera in alert mode.

Applications
For home users: monitor climate in bedrooms, bathrooms, kitchens; prevent mold and maintain comfort.
For engineers/electricians: ideal for HVAC automation and smart home systems (Home Assistant, Zigbee2MQTT).
For business/industry: warehouses, labs, archives, greenhouses, and server rooms for temperature and humidity control.

Pros
• High measurement accuracy (±0.2 °C / ±2 % RH)
• Wide operating range – from –20 °C to +60 °C, up to 100% humidity
• IP65 rating – suitable for humid environments
• Compact and aesthetic design
• ZigBee 3.0 – stable, low-power connection
• Integrates with smart home platforms
• LCD display for quick readings
• Long-lasting battery

Cons
• Requires ZigBee bridge for connection
• Not suitable for extreme temperatures (<–20 °C or >+60 °C)
• Battery replacement needed every 12–18 months